Obdisk 3: Professional 3-disc Pregnancy Calculator/ Obstetric Wheel (Pocket-Sized)

Product Information

Obdisk 3: Pocket-Sized 3-disc ObdiskTM

For calculating a pregnant mum's Due Date (EDD) and the fetal gestational age - by dates and by scan.

You'll find the Obdisk 3 invaluable if you're a midwife, GP, obstetrician, neonatologist or ultrasonographer... or an expectant mum.

An Obdisk 3 has got 3 discs, and it's very easy to use. It can show the 'mum's dates' and the scan dates at the same time - if necessary. Particularly useful if there's a discrepancy between the dates - no more fumbling with the discs! The LMP dates are shown in purple, and the scan dates are shown in red. (And if there's no discrepancy between the dates it's even simpler - just use one of the sets of dates.)

The Obdisk 3 is very clear to read, because it's over 5 inches in diameter (approx. 13 cm or 131 mm). And it fits into the pocket of a standard midwifery uniform or a doctor's white coat, so it can be readily available at all times.

It's made of plastic, weighs about 31g, and it's very good quality. Its 3-disc design is patented (Copyright: Dr.C.Everett), and it's screenprinted and carefully assembled.

The Obdisk 3 is a professional product. And it's also ideal if you're pregnant.

Obdisk 3 instructions for expectant parents (Based on a regular 28-day menstrual cycle) Please note: Your Due Date is a guide only, and a small proportion of babies are born on this actual date. Babies generally arrive when they're ready, so please be guided by your doctor or midwife. 1. Take the FIRST DAY of your LMP (Last Menstrual Period). That’s the date that your last period STARTED. 2. Moving the middle disc, line up the purple LMP arrow with your own LMP date. (All dates are clearly marked on the bottom disc.) 3. Line up each day carefully as you follow the calendar around, adjusting the discs very slightly, if necessary, to match the days exactly. You can now read off your EDD (Expected Date of Delivery) at the point marked “LMP EDD”. This is your Due Date according to ‘Your Dates’. 4. If you have a dating scan, you’ll be told how many ‘weeks’ you are by scan. Simply turn the top disc, so that it agrees with your scan dates. 5. It’s easy to read off both sets of dates on your Obdisk 3 at the same time, because the top two discs are transparent. Basically, ‘Your Dates’ are shown in PURPLE, and the ‘Scan Dates’ are shown in RED. 6. Throughout your pregnancy you can see how many weeks you are by dates and by scan, AT THE SAME TIME. (If there’s a difference between these dates you may wonder why. Different hospitals have different policies about how to deal with a discrepancy between the ‘period dates’ and the ‘scan dates’, but your midwife or doctor will be able to explain this to you.)

[Abbreviations: LMP=Last Menstrual Period; EDD=Expected Date of Delivery or Expected Due Date]

This is the Price for one Obdisk 3 Pregnancy Wheel (Pocket-sized: 131mm), including Delivery within the UK...

Price: £10.00